linux-kernel - Re: [PATCH 3/4] tracing/profile: Add filter support

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Date:	Tue, 13 Oct 2009 11:16:17 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Li Zefan <lizf@...fujitsu.com>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Tom Zanussi <tzanussi@...il.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/4] tracing/profile: Add filter support

On Tue, 2009-10-13 at 10:19 +0800, Li Zefan wrote:
> +#ifdef CONFIG_EVENT_PROFILE
> +       struct event_filter             *filter;
> +       int                             filter_active;
>  #endif

Why do you need filter_active, isn't !filter equivalent?
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